Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's Galaxy  ·  M 81  ·  NGC 3031
Bode's Galaxy (M81) - HaLRGB, dswtan
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Bode's Galaxy (M81) - HaLRGB

Bode's Galaxy (M81) - HaLRGB, dswtan
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Bode's Galaxy (M81) - HaLRGB

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Description

A loose end from April - adding Ha to my earlier 2021 LRGB M81.

Fought some odd grid pattern of "noise" on this one, really strong in the Ha. Rescued an image I'm ok with, but not what I'd hoped. Will re-try with cleaner data and more practice next year. It may be this: https://www.cloudynights.com/topic/578998-fixed-pattern-noise/

90x 60sec Ha = 1.5hrs

196x 60sec L2 = 3.3hrs

90x 60sec RGB each = 1.5hrs x3 = 4.5hrs

Total integration = 9.3hrs

No Topaz Denoise AI on this one.

Improvement from last year's noisy OSC effort on the same RC8 scope here: https://astrob.in/174oxn/B/

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Bode's Galaxy (M81) - HaLRGB, dswtan

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Cloudy Nights